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Method for end-to-end hybrid automatic repeat request and system thereof

a hybrid automatic repeat request and end-to-end technology, applied in the field of hybrid automatic repeat request, can solve the problems of inability to achieve efficient operation of the crn, inability to improve transmission throughput and spectrum utilization efficiency, and inability to guarantee the transmission opportunity of an opposite direction, etc., to achieve the effect of effective use of puncture codes, minimizing outage probability, and high transmission throughpu

Active Publication Date: 2013-04-16
ACER INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a method and system for a hybrid automatic repeat request in a cognitive radio network. This method involves coded cooperation among multiple relay paths and nodes, allowing for error control in a session level. The method dynamically adjusts the amount of information transmitted to each relay path based on channel distribution information, reducing the likelihood of outage and achieving high transmission throughput.

Problems solved by technology

Each uni-directional opportunistic wireless link in each one of the multi-hop relay paths can just guarantee to obtain a uni-directional transmission opportunity, but cannot guarantee a transmission opportunity of an opposite direction.
Therefore, the link of the CRN is lack of an error control mechanism in a link layer (level) and also lack of an automatic repeat transmission mechanism in the link layer (level), which is developed with the assumption of link bi-directionality.
Therefore, efficient operation of the CRN cannot be achieved, and the transmission throughput and the spectrum utilization efficiency cannot be improved.

Method used

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  • Method for end-to-end hybrid automatic repeat request and system thereof
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  • Method for end-to-end hybrid automatic repeat request and system thereof

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[0029]The invention provides a method for an end-to-end hybrid automatic repeat request and a system thereof, which are adapted to a cognitive radio network (CRN) having a plurality of nodes. In the following descriptions, a system structure of the CRN is introduced with reference of FIG. 1, detailed functions of main components in the CRN are introduced with reference of FIG. 2A-FIG. 2C, and detailed procedures of the method for the end-to-end hybrid automatic repeat request are introduced with reference of FIG. 3-FIG. 5.

[0030]FIG. 1 is a schematic diagram illustrating a cognitive radio network according to an exemplary embodiment of the invention. The CRN has a plurality of nodes, and the nodes includes at least one source node S, at least one destination node D and a plurality of relay nodes R11, R12, . . . , R1M1, R21, R22, . . . , R2M2, RL1, RL2, . . . and RLML, etc. According to another aspect, the CRN coexists with at least one primary wireless network, and the primary wirele...

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Abstract

A method for an end-to-end hybrid automatic repeat request and a system thereof are provided. The method is applicable in a cognitive radio network (CRN) including at least a source node and a destination node. There are paths between a source node and a destination node in the CRN, and each path has a plurality of wireless links. The method includes the following steps. The source node encodes information into a coded packet, divides the coded packet into coded sub-packets, and transmits the coded sub-packets to the paths. Through the wireless links of each path, a coded sub-packet is amplified and forwarded to the destination node. In addition, the destination node combines the coded sub-packets for decoding so as to recover the information, and transmits an acknowledgement packet to the source node for notifying whether the information is successfully recovered.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the priority benefit of Taiwan application serial No. 99117019, filed on May 27, 2010. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.BACKGROUND[0002]1. Field of the Invention[0003]The invention relates to a method for a hybrid automatic repeat request. More particularly, the invention relates to a method for an end-to-end hybrid automatic repeat request and a system thereof used in cognitive radio networks of multi-hop relay.[0004]2. Description of Related Art[0005]Cognitive radio network (CRN) technology is used to improve a spectrum utilization efficiency of wireless communication. Each node in the CRN can detect whether or not neighbouring nodes in a primary wireless network having a licensed wireless spectrum are using the licensed wireless spectrum, and transmit data to the other neighbouring nodes in the CRN by using a ti...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G08C25/02H04J3/22H04J3/16H04L1/18
CPCH04L1/1838H04L1/1845H04L1/1848H04L2001/0097H04L2001/0093
Inventor AO, WENG-CHONCHEN, KWANG-CHENG
Owner ACER INC
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